Make a tunica for yourself and wear it in class. The pictures in the loop show you what it looks like.

You can use white cotton or white paper.

For a girl's tunica that is full length, you need enough fabric to reach from shoulder to floor. You fold the fabric and sew the edges to make a tube.

Fasten the top edge with buckles so that the buckles hold it on top of your shoulders. Tie it with cord around the waist.

A boy's tunica needs less material because it only comes down to the knees.